Single Responsibility Principle: One Job Per Class
Single Responsibility Principle (SRP) means each class should have only one reason to change. Break up complex classes into smaller, focused ones for cleaner code and easier maintenance.
Let’s be honest—most of us have, at some point, crammed way too much into a single class. We start out with a nice little InvoiceManager, and before long it’s calculating taxes, saving to disk, sending emails, and making coffee. It works… until it doesn’t. That’s where the Single Responsibility Principle (SRP) comes in—and it’s more than a fancy acronym. It's the “S” in SOLID, and it’s all about one thing: A class should have only one reason to change. What That Actually Means If a class has multiple responsibilities, it has multiple reasons to change. That might not sound dangerous...